GB992275A - Improvements relating to apparatus for stopping an electrically driven machine part in a pretermined position - Google Patents
Improvements relating to apparatus for stopping an electrically driven machine part in a pretermined positionInfo
- Publication number
- GB992275A GB992275A GB30888/62A GB3088862A GB992275A GB 992275 A GB992275 A GB 992275A GB 30888/62 A GB30888/62 A GB 30888/62A GB 3088862 A GB3088862 A GB 3088862A GB 992275 A GB992275 A GB 992275A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- transistor
- brake
- energized
- photo
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/22—Devices for stopping drive when sewing tools have reached a predetermined position
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
992, 275. Sewing machines. O. B. SCHWAB, [trading as FRANKL & KIRCHNER]. Aug. 13, 1962 [Aug. 23, 1961], No. 30888/62. Heading D1G. [Also in Division H2] To stop a series commutator motor 7 driving a sewing machine, treadle 1 is released so that starting resistance 4 is increased until the motor is de-energized. Contacts 5, 6, are engaged before the motor comes to a standstill and a control circuit comprising transformer 12, 13 is energized. A transistor 16 is conductive, provided that centrifugal switch 11 is closed, so that electromagnetic brake 10 is excited to apply the brake and relay 17 responds so that the motor remains disconnected from the line during the braking operation. When the motor reaches a low speed, the centrifugal switch is opened whereby control of transistor 16 is taken over by photo-transistor 18. If the transistor receives light from source 14 by way of reflector 21 on balance wheel 22, its resistance is reduced and transistor 16 remains conductive so that the motor continues to be braked and may come to a standstill. The setting of reflector 21 corresponds to the dead centre position of the sewing machine needle. If the machine overruns this position, the motor is re-connected and continues to operate until the reflector again throws light upon the photo-transistor element whereupon the brake is re-applied. The brake comprises armature 27 coupled to rotor shaft 26, the brake coil being associated with non-magnetic disc 30 having a friction surface. A magnetic disc 32 is fixed to the armature 27. When the motor is energized, the brake is released due to axial movement of the rotor. The centrifugal switch 11 comprises insulating disc 34 supporting spring elements 35, 36, to which are fastened carbon brushes 37, 38. The rotating part of the switch comprises insulating plate 41 having slip-rings 42, 43. Weights 44, 45, are interconnected by a strap and are adapted to engage members 47, 48, connected to the sliprings. At low speeds, one or both weights hang down to interrupt the current. The control components except the photo-transistor 18 and light source 14 are accommodated within the motor housing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF34753A DE1160075B (en) | 1961-08-23 | 1961-08-23 | Device for stopping an electric motor drive in a certain angular position, especially for sewing machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB992275A true GB992275A (en) | 1965-05-19 |
Family
ID=7095695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB30888/62A Expired GB992275A (en) | 1961-08-23 | 1962-08-13 | Improvements relating to apparatus for stopping an electrically driven machine part in a pretermined position |
Country Status (3)
Country | Link |
---|---|
US (1) | US3187701A (en) |
DE (1) | DE1160075B (en) |
GB (1) | GB992275A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3412260A (en) * | 1963-09-20 | 1968-11-19 | Frankl & Kirchner | Electrical drive means, particularly for sewing machines |
DE1243412B (en) * | 1966-02-24 | 1967-06-29 | Braun Ag | Drive for disc-shaped sound carriers |
US3538743A (en) * | 1968-09-03 | 1970-11-10 | Avco Corp | Shock-testing machine control system |
US3604546A (en) * | 1969-08-18 | 1971-09-14 | Computervision Corp | Angular registration assembly and driving apparatus therefor |
JPS5714875B2 (en) * | 1973-03-23 | 1982-03-26 | ||
US4554498A (en) * | 1981-03-16 | 1985-11-19 | Mitsubishi Denki Kabushiki Kaisha | Control apparatus for running moving object |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE561917C (en) * | 1932-10-20 | Aeg | Device for monitoring centrifugal contact regulators for electric motors | |
DE461905C (en) * | 1923-01-14 | 1928-07-02 | Lorenz Akt Ges C | Centrifugal governor for keeping constant the number of revolutions of prime movers, especially electrical machines |
DE607468C (en) * | 1931-11-27 | 1934-12-28 | Aeg | Automatic control for spindle adjustment devices driven by an electric motor |
US2129847A (en) * | 1932-09-17 | 1938-09-13 | Agfa Ansco Corp | Winding roll film |
DE869288C (en) * | 1948-10-02 | 1953-03-02 | Elektror Karl W Mueller | Control starter sewing motor |
DE1041780B (en) * | 1952-07-22 | 1958-10-23 | Singer Mfg Co | Drive device for sewing machines |
US2753502A (en) * | 1952-12-02 | 1956-07-03 | Bardons And Oliver Inc | Electric motor control for spindle positioner |
US2920221A (en) * | 1954-10-01 | 1960-01-05 | Schwab Olga Brunhilde | Sewing machine drive system |
FR1142432A (en) * | 1954-12-15 | 1957-09-18 | Wuertt Elektromotoren G M B H | Housing for electric motor, in particular for sewing machine motor, combined with a starter-regulator |
US2886755A (en) * | 1955-05-24 | 1959-05-12 | Honeywell Regulator Co | Servomotor system control apparatus |
US2920257A (en) * | 1957-05-09 | 1960-01-05 | John H Miles | Sewing machine motor control |
US2946418A (en) * | 1957-09-20 | 1960-07-26 | Warner Electric Brake & Clutch | Electrical control of torque transmitting mechanism |
US2939064A (en) * | 1959-05-20 | 1960-05-31 | Singer Mfg Co | Motor control systems |
-
1961
- 1961-08-23 DE DEF34753A patent/DE1160075B/en active Pending
-
1962
- 1962-08-13 GB GB30888/62A patent/GB992275A/en not_active Expired
- 1962-08-17 US US217670A patent/US3187701A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE1160075B (en) | 1963-12-27 |
US3187701A (en) | 1965-06-08 |
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